Meghan Markle used a code on the set of 'Suits' to keep her romance with Prince Harry under wraps.

Meghan Markle

Meghan Markle

That is according to her former co-star Wendell Pierce, who played her dad on the popular TV show, which she walked away from before announcing her engagement to the prince.

Recalling a "wonderful moment" on the set of the show shortly before Meghan quit, Wendell shared: "It was just she and I in the room and I said, 'I know your life is going to change but always know, no matter where you are, I will always be your loving fake father.'"

Meghan, 36, and the flame-haired prince started dating in mid-2016, and they announced their engagement in late November last year.

The brunette beauty - who quit the show in order to take up her royal duties - previously revealed she relishes a "great love story" and that the couple are "in love".

Meghan - who was previously married to film producer Trevor Engelson from 2011 until 2013 - said: "We're two people who are really happy and in love.

"This is for us. It's part of what makes it so special, that it's just ours. But we're happy. Personally, I love a great love story."

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